382 SUMMAKY OF CURRENT RESEARCHES RELATING TO 



1 



with reference to the number of spines on the inner lobe of the former 

 and the number of joints in the palp of the latter. It is proposed 

 to divide the sub-order Valvifera into two groups : — Astacillinea 

 (Astacillidsp, Chgetiliidsi, Amesopodidse), and Idoteina (Idoteidae, 

 Pseadidotheida^, Holognathidse). J. A. T, 



Siboga Crabs, — J. J. Tesch {Resultats Explor. Sihoga, 1918, 

 Monographe 39c, 1-148, 6 pi.)- The Siboga Indo-Pacific collection of 

 Catometopous Crabs in the five families : Hymenosomida?, Retroplumidae 

 (= Ptenoplacidae), Ocypodidag, Grapsidae, and Gecarcinidse, comprised 

 sixty-eight species. Of these only four were new, which is explained by 

 the fact that the Siboga was mostly concerned with deep water, whereas 

 the Ocypodidse, Grapsidse, and Gecarcinidse are shore animals, and have, 

 moreover, been largely collected of recent years. The author has 

 discovered numerous new facts, and he has extended his range beyond 

 the Siboga material so as to present a synopsis of all the known Indo- 

 Pacific species. J. A. T. 



British Occurrence of Nematoscelis megalops. — 0. M. Jorgensen 

 {Report Dove Marine Laboratory, 1918, New Series, 1, 65, 1 fig.). 

 Large numbers of the Schizopod Nematoscelis viegalops Sars. were 

 found dead in high-water sandy pools at Cullercoats. It is an oceanic 

 form occurring in the North and South Atlantic ; it is recorded also 

 from the Indian Ocean, the Mediterranean, off the Labrador and Nova 

 Scotia coasts, and in the Irish Sea. This appears to be the first record 

 of its occurrence on the eastern coast of Great Britain. The largest 

 specimens were 20 mm. long. Amongst them there were specimens of 

 the large form of Euthemisto compressa Goes. • J. A. T. 



Notes on Development of Shore-crab. — Olga M. Jorgensen 

 {Report Dove Marine Laboratory, Cullercoats, 1918, New Series, 7, 

 62-4). The length of the first larval or protozosea stage of Garcinus 

 msenas appears to be between twenty and thirty hours (in one case 

 about forty-four hours). The second stage or first zoasa appears to last 

 from forty-eight to seventy-two hours. Average length measurements 

 for the first three stages are given : — protozosea, 1 • 7 mm. ; first zo«a, 

 1*95 mm. ; and second zo^a, 2*1 mm. J. A. T. 



Annulata. 



Lymph-glands of Pheretima. — G. S. Thapar {Records Indian 

 Museum, 1918, 15, 69-76, 1 pL). In earthworms of this genus there 

 are segmentally arranged whitish glands on each side of the dorsal 

 blood-vessel throughout the intestinal region. The capsule of the gland 

 is peritoneal in origin, and may be regarded as an irregular sac-like 

 forward bulging of the septum which has become very delicate. The 

 main mass of the cells of the glands consists of leucocytes with a phago- 

 cytic function as Schneider showed. The ccelomic fiuid is yellowish ; 

 it contains leucocytes, minute colourless non-granular cells, yellow cells, 



