1122 THE VOYAGE OF H.M.S. CHALLENGER. 



the apical) ; facial half divided into three to five lobes, an odd frontal and one or two lateral pairs 

 of small buccal lobes. Thorax truncate conical, about as large as the cephalis and larger than 

 the truncate abdomen. Pores regular circular. 



Dimensions. — Length of the shell 012, breadth 0-08. 



Habitat. — Tropical Atlantic Station 347, depth 2250 fathoms. 



2. Pylohotrys fontinalis, n. sp. (PI. 96, fig. 20). 



Cephalis trilobate, with three ovate lobes in the sagittal plane, of nearly equal size, and two 

 divergent cylindrical tubes conical at the base. An ascending apical tube on the apex of the 

 occipital lobe and a descending sternal tube on the base of the frontal lobe. The middle lobe 

 between the former distinctly exhibits in the apical view (fig. 20) the collar septum with the four 

 cortinar pores. Thorax campanulate, larger than the cephalis and the truncate abdomen. 



Dimensions. — Length of the shell Oil, breadth O^OG. 



Habitat. — Western Tropical Pacific, Station 225, depth 4475 fathoms. 



3. Pylohotrys cerebralis, n. sp. (PL 96, fig. 22). 



Cephalis multilobate, with four divergent cylindrical tubes, which are cylindrical, obliquely 

 truncate at the mouth, and correspond in position to the four typical spines of Cortina; an 

 ascending apical tube and three descending basal tubes (an odd caudal and two paired pectoral). 

 The helmet-shaped occipital lobe is about as large as the frontal half of the cejAalis, which is 

 divided into three pairs of smaller pyriform lobes. Thorax subspherical, about as large as the 

 cephalis and half as large as the inflated abdomen. Pores very scarce and small. 



Dimensions. — Length of the .shell 015, breadth 0'08. 



Habitat. — Indian Ocean, Cocos Islands, Eabbe, surface. 



Genus 494. Botryocampe} Ehrenberg, 1860, Monatsber. d. k. preuss. Akad. 



d. Wiss. Berlin, p. 829. 



Definition. — P ylobotryida without tubes on the cephalis, and with the mouth 

 of the abdomen closed. 



The genus Botryocampe may be derived from Botryocyrtis by development of ;i 

 basal lattice-plate, closing the terminal mouth of the abdomen. It is at the same time 

 closely allied to the Tricyrtid Theocapsa, and may be perhaps derived from this liy 

 lobation of the cephalis. 



1 Boir2/oca?7vpe = Caterpillar with a grape ; /iar^v;, x.afi'xri 



