5G6 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.38. 



with median eresl and ten other carinas; submedian spines with 

 movable tips; denticles 0, 2, 1; basal process of uropods three- 

 spined, outer spine longest. 



Length 13 to l.'H cm. 

 Callao, January 29, 1907. 



Distribution. — From Wilmington, California, to Chile. 



LYSIOSQUILLA DECEMSPINOSA, new species. 

 Plate 53, fig. 3. 



A mantis shrimp with depressed body; rostrum transversely 

 oblong, with a median spine, anterior angles produced. Eye stalks 

 short, stout, cylindrical: cornea\idobular. Dae ty his of raptorial claw 

 with ten spines. Abdomen dorsally smooth; six marginal spines on 

 telson; intermediate denticles, '.), 1, 0, almost concealed in dorsal 

 view by the overhanging margin; basal prolongation of uropods 

 alined with two long spines. 



Length about 24 mm. 



Near L. armata Smith," which is larger and has a differenl arrange- 

 ment of -pines on the telson. 



Type-locality. -Capon. 



Living in vertical holes in the muddy sand of the inside beach at Capon. Small 

 yellow eggs were often noted attached to the .-ides of the holes. January 30, 1!H)8. 



Type.— Cat. No. 40498, U.S.N.M. 



LIST OF THE PRINCIPAL WORKS RELATING TO THE STALK-EYED 

 < EtUSTACEAN FAUNA OF THE PERUVIAN PROVINl E 



Bell, Thomas. On Microrhynchus, a new Genus of Triangular Crabs. Proc. Zool. 

 Soc. London, vol. 3, L835 (published Sept. 25, L835), p. 88. 



Observations on the Genus Cancer of Dr. Leach (Platycarcinos, Latr.), with 

 Descriptions of three New Species. Proc. Zool. Soc. London, vol. 3, L835 (pub- 

 lished Sept. 25, L835), pp. 86 88. 



Observations on the Genus Cancer of Dr. Leach (Platycarcinus, Latr.), with 



Descriptions of three new Species. Trans. Zool. Soc. London, vol. I. is:55, pp. 



i 342, pis. 13-47. Quarto. 



Some \.ccoun1 of the Crustacea of the Coasts of South America, with Descrip- 

 tions of New < ; en era and Species; founded principally on the Collections obtained 

 by Mr. Cuming and Mr. Miller (Tribus L, Oxyrhynchi.). Proc. Zool. Soc. London, 

 vol. 3, L835 (published IV1,. lm, is:',r,i, pp. Id!) 17:;. 



Some Account of the Crustacea of the ('oasts of South America, with Descrip- 



tions of new < ienera and Specie-: founded principally on I he Col lee lion- obtained 



by Mr. Cuming and Mr. Miller. Trans. Zool. Soc. London, vol 2, L836, pp. 39 66, 

 pis. 8 L3. Quarto. 

 Bouvibr, E.-L, » 'n ist aces decapodes nouveaux recueillie a Pai'ta ( Perou | ]>ar M. le 

 Dr. Rivet. Bull. Mub. hist, nat., Paris, 1907, no. 2, pp. L13 I Hi. text figs. I 3. 

 \.rctus delfini Sp. Nov. Revista Chilena Bist. Nat., vol. 13, 1909, pp, 213 215, 

 I fig. 30. 

 Cano, Gavino. Crostacei Brachiuri ed Anomuri raccolti nel viaggio della Vetttor 

 Pisani intorno al globo. Boll. Soc. Nat. Napoli (1), vol. 3, 1889, pp. 79-105, 

 L69 26$ 



"See Bigelow, Pro,. I s. Nat. Mn-. vol. 17, [894, |> 503. 



