ART. 5 



PARASITIC CRUSTACEA OF WEST INDIES BOSCHMA 



The type species of this genus is Sacculvna corculwn Kossmann. 

 Among my material I have complete series of sections of three 

 specimens belonging to this species. All of these have a complete 

 mesentery and curved testes, whilst the visceral mass is united with 

 the mantle at some distance from the stalk. ^ Kossmann's figure of 

 the type species does not show distinctly the unusual place of the 

 stalk.^ The other characteristics of the genus (the curved testes and 

 the complete mesentery) are clearly drawn in another figure by the 







>4 



d 



Fig. 3. — Drepanorchis occidentalis. a, part of the external cuticle of a speci- 

 men FROM PlTHO ANISODON (VON MARTENS), X 440. 6, PART OF THE EXTERNAL CUTI- 

 CLE OF A SPECIMEN FROM MiTHRAX FORCEPS (A. MILNE-EDWARDS) , X 440. C, RET- 

 INACULUM OF A SPECIMEN FROM MACROCOELOMA CAMPTOCBRUM (STIMPSON), X 440. 

 d, INTERNAL CUTICLE WITH RETINACULA OF A SPECIMEN FKOM MiCROPHRYS BICORNUTUS 

 (LATRBILLE), X 110. 6, RETINACULUM OF A SPECIMEN FROM MiTHRAX SCULPTUS 



Lamarck^ X 440. /, retinaculum of a specimen from Pitho anisodon (von 

 Martens), X 440. g and h, retinacula of a specimen from Microphrys bicoenu- 

 Tus (Latreille), X 440 



same author.' Probably the first of Kossmann's above cited figures 

 was not altogether correct, for all other peculiarities of my speci- 

 mens closely fit in with this author's description. As in the type 

 specimen their external cuticle is provided with long and stout spines. 

 On account of the last-named feature the species Loxothylacus 

 corculum (Kossmann), is one of the best characterized species of 

 the whole family. The West Indian species which is described 

 below differs from L. corcuVwm especially in the smaller size of its 

 cuticular excrescences. 



1 See Van Kampcn and Boschma, 1925, pi. 2, fig. 3. 

 « See Kossmann, 1872, pi. 2, fig. 5&. 

 » Idem. pi. 2, fig. 5a. 



